Lock.



A B.A BORLAND.

LOOK. l APPLIoATIoN FILED JUNE 14, 190s,

940,300. Patented N0v.16,19o9. j

3 SHEETS-SHEET 1.

'darf-,sg

B. BORLAND.

LOCK.

APPLICATION FILED JUNI: 1&1. 1905.

940,300. Patntea NOI/16,1909

3 SHEETS-.SHEET 2.

B; BORLAND.

LOCK.

APPLIoATIon FILBDJUHB 1'4, 1905.

' Patented N0v.16.1,9o9.

3 SHBETB-SHBET 3.

BRUCE BORLAND, F CHICAGO, ILLINOIS.

Loox.

Specification of Letters Patent.

Patented Nov. 16, 1909.

Application led .Tune 14, 1905. Serial No. 265,206.

To all 'whom it may concern: g Be it known that I, BRUCE BORLAND, aciti- `zen of the United States, residing at Chi-l Vhad therein to theaccompanying drawing.

My invention relates to locks, and partici' ularly -to multiple-key orchangeable key locks designed for vaults, safe-deposit boxes, and thelike. In this class of devices an 1nner box is usually removable from acompartment or box proper whose door is provided with a lock, thegeneral practice being for the depositor to withdraw this inner box andcarry it to a. separate booth or room to examine his papers, the door ofthe compartment or box proper usually remaining open until the inner boxis returned to place. In these locks the combination is re-settable orcapable of being changed to accommodate different keys for variousreasons; for ex-y ample, if a depositor or box-.holder loses his key thecombination maybe changed or reset to a different key to prevent thefinder of the lost key or other unauthorized person using such key toopen the box. The change j in the-'combination can be effected only whenthe door upon which the lock is located is open to provide access to thebox because the parts operated to change or re-set the comstructedwithout the knbwledge of the owner of the box, and in this way gainaccess to 'the box without the use of the key held by the owner Thus anunscrupulous or dishonest guard might reset the lock` to another keywhile he was in attendance upon a. customer holding the key to the,lock,

The special object of the present invention is to preclude thepossibility of the surreptitions changing oi the combination of such alockm'hilelthe box to which it is applied is open by setting itstum'blers to a key which u'ouldthen be kept for future use by the personwho wrongfully changed the combination or b someone in league with him.

With this object in view the invention consists in tue cerdination withthe 'resetting means of a safety or supplemental lock actuate by a keywhich vwill prevent the surreptitious resetting 01" the main lock andcontrol the changing or resetting of the combination of the main lockfrom its adaptation to a depositors or change-key of one form to that ofanother form. The key of this safety or supplemental lock is held bythel manager of the safe-deposit vault, and so it is indispensable thatthe manager be present and co crate to resetthe combination; his suppemental lock controls this change, and its operation and his presenceare conditions precedent to resetting the combination for anotherdepositors or change-key.

Other objects and advantages of the in-4 vention will be apparent fromthe accompanying disclosure.

In the -accompanying drawings, which illustrateone embodiment of theinvention- Figure 1 is aperspective view of the lock, showing the boltin its shot position; Fig. 2 is a plan view of the same with the boltlatch released; Fig. 3 is a sectionl on the line 3 3 of Fig. 2; Fig. 4is a section .substantially on the line 4 4 of Fig. 3; Fig. 5 is adetail perspective view of the rotating bolt tumblers showing the sameseparated from each other for purpose of clearness; Fig.l G is a detailside elevation of the bolt and locking latch;

Fig. 7 is a fragmentary plan view of thev lock showing the lockingtumblers in their registered position; Fig. 8 is a plan View with thelocking tumblers disengaged from the operating gears and the parts inposition for changing the combination; Fig. 9 isa detail sectional viewpartially in elevation of `the key way and pin; Fig. 10 is a detail sideelevatio of the master tumblers; Fig. 11 is a side e evation of a keyemployed with the lock; Fig. 12 is a similar view partially in section;Fig. 13. is an end elevation of the key; and Figs. 14, 15 and 16 arediagrammatic views'of various forms of keys einployed with the lock.

Referring to the drawings, 15 indicates the lock casing.' This easingmay be of .any suitable shape and size and in thepresent instance isshown as rectan lar and provided ,with a face plate 16 suita ly securedthereto.

The front end of the `casing is provided with the lusual opening 17 inwhich reciprocates thebolt 18. The movement of the bolt is limited inits shot or advanced position by suitable shoulders 19, as show'n inFig. 2,

Q j Y 940,300

which engage shoulders 20 on the front end of the casing. The bolt 18 isprovided with a rearwardly extending tail 21 which ex-` tends from oneend thereof and is located adjacent one of the side walls of the casing.The rear end of the tail 21 is provided with teeth, the toothed portionbeing in the form of a rack bar 22 which in the presentem bodiment ofthe invention extends beyond the end of the tail 21, and in a differentplane as shown in Fig. 6. A bolt latch 23 is pivoted between its ends ona post 24. on

the front face ofthe tail 21fand=its rear end is adaptedto engage a'stop 25 which may be A tumblers, and'in the preferred embodiment of myinvention. I' employ two sets of tumblers operated respectively by -thedepositors or changefkey formed in the adjacent side wall of thecaswardly, as at 28, so as to react against -the bolt latch 23. Thelatch 23' is provided with an inwardly extendin tooth 29, the'purpose of'which will be ereinafter explained. While the stops 20 arrest theboltein its shot position the bolt latch 23 by reason of its engagementwith the stop 25 holds the bolt,-

m such position and prevents retraction thereof until the' latch lisreleased'. The latch is released trom its position dogging the bolt andthe bolt is retracted by suitable and by the guards or custodians kenelther key alone being capable of unloc ing Athe box, the lockintumblers being constructed to be set to di Aferent combinations forcoaction with differ-` ent depositors keys and the guard tumblers of allthe locks being operative by the sameuard-key which therefore is amasterkey or all' the boxes. The locking tumblersI in the presentembodiment of my invention are two-part tumblers the respective partswhereof may be reset for coaction with ditferent change-keys andcomprise-two-sets of coperati'ng. rotatable wheels, the sets being 4locked and unlocked -by a resetting `means comprising anadjust1ngeccentric `Whichsimultaneously moves the wheels of one' setwith respect to the other so as to unlock the sets vand then restoresthe parts to engaged i' position after the combination has been vchanged to a different depositors key, The emental or safety lock forpreventingi SUPP surr'eptitious resetting of'the tumblers con-v trolsthis adjusting-eccentric.

A post 30 mounted at its lends in the rear wall 31 ,and face plate-16 ofthe casing is provided with an eccentric Aportion as.v clearlyv shown inthedrawings. The locking tumblers are in twoparts, and the `movableparts 'or wheels 32, 3'3 and 34 'of the locking turnblers are` pivotedvon this eccentric, these wheels being designed when in certain osi--tlons to prevent the disengagement o the bolt latch 23 from lthe sto 25, but adapted to be suitably operated an moved to a pre determinedposition to permit the release of the latch from its stop to allow thebolt to beiretracted. In the present A.instance 'three tuinblers areemployedand the number may ofcourse be varied. The wheels are pro-Avided' with suitable teeth and in the present instance are in the formof pinions. Each wheel is provided with a radial slot 35 extendinginwardly from the periphery thereof va suitable distance formi-ng agating. When the bolt is shot and the wheels 32, 33

and 34 are in locking position the gatings 35 are out of alinelnent orregister so that j the body of the wheels obstructs the movei ment ofthe bolt latch by presenting the solid 'portions thereof in the-path ofthe tooth` 29, the length ofvwhich is at least e ual tothe combinedthickness of the w eels. A pinion 36 is pivoted on a hub 37 ofthe post30 back ofthe wheel 34 and meshes with t-heA rack bar 22. The wheels432, 33 .and 34 constitute the parts of the tumble'rs movable by theresetting means 30 to permit the tumblers to'be reset for a' differentchange-key, and may .be rotated to bring theirv gatings 35 intoregisteredv or un- 'lockln position'through the. medium vof any suitab emeans constituting the other parts v ofv the two-part tumblers; d In theembodiment of` the invention .I emp oy for this purpose a second `set ofwheels such as the series of gears 38, 39 and 40 which are pivoted on apost 41 the ends of which aremounted in the opposite walls of thecasing. The gears 38, 39 and 40 mesh with the pinis also pivoted on'thepost-41 between the adapted to mesh 4with .the pinion 36.

,the gears 38, 39 andV 40 aredesignedv to ro`- tate independently ofleachother, in order to prevent movement by frictional engagement onewith another Ifpreferably separate these lgearsby plates-43. iThesef'plates are resent ions 32, 33 and '34',-res`pectively. A gear42 i'i '1.10 gear 40 and the wall 31`and this gear 42 vided with suitableopenings through w ich.-

Vthe post v41 passes' and are. heldy against -*movement on such post bymeans of a pin 444 which is fixed in the rear wallf31of the- `ca s4 ingand passes-.through suitable openinjgsin The ears 38,39 and'40 areprovidedwit peri'p eral slots;- as clearly shown'fin Fig and pivoted .onlthe 'post 41 is aj pair of yokes rae The' plates 43 'may be extended,as att; so as tov project between'the' pinions"32,33 34, in order tospace.,t'he!nj;,in accordance with the spacing. of the gears 38,939-amt-4 0 47 the arms of which are pivoted on the said post above andbelow, the group ofgears 38, 39, 40 and 42.

Theseyokes 47 act in opposition to each other against the edges of therecesses in the gears and arel held under. spring pressure by means of aspring 48 which passes around the post lstl-and has its ends bent over,as at a9, to engage the and unlocking position it is necessary todisengage the bolt latch or dog 23 from stop 25 against the tension ofits spring 26 so that the bolt lmay be retracted.

Any suitable means may be employed for releasing the latch, andpreferably such means under control'of a masterror guardkey is employed.In the present embodiment of the invention I employ-,a cani 50 which ismaintained in its operative position by means of a series of master orguard tumblers. This cam 50, in the construction illustrated. is formedon a hub 51 provided with trunnions 52 pivoted in the oppositeV walls ofthe casing. A pinion 53 is rigid with the hub 5l and is located betweenthe latter and the wall 31 of the casing. A post 54'is mounted at itsends in the opposite wallsof the casing and is provided with a pluralityof master or guard tumblers 55, 56 and 57. .Three `such tumblers areshown although the number thereof is not material and 'may be varied.These. tulnblers may be of any suitable construction but in the presentinstance are in the form of mutilated gears yand are provided withnotches in the periphery thereof forming gatings 58. The hub is providedwith a tooth 59 the length of which is at least equal to the combinedthickness of the tumblers 55, 56 and 57. A gear is pivoted on thepost-54 and meshes with the pinion 53. `When the boltis shot and themaster tumblers are in their locking position the gatings 58`are ont ofalinement ,and the-cani50 is held against movement by reason of theengagement of the tooth 59 with the body portions of such tumblers.When, however, these tumblers are moved into unlocking or registeredposition, that is to say wherbtheir gatings 58 are in alinement, andwhen the gear O'ist-urned back- Ward or contra-clockwise, the tooth 59will enter. the alined gat-ings 58 therebyturning thepin ion,53 andconsequently moving the cam 50 into engagement with the ,end of thelatch or dog 23, and the gatings 35 of lthe, locking tumblers being' inalinement,` the.

and the gear 60.

tooth 29 of the latch will enter theV alinec' gatings 35 clearing thestop 25 so that when the pinion 36 is rotated the bolt will be withdrawnor retracted. The master tumblers 55, 56 vand 57 are cut out or recessedand provided with spring pressed yokes 61 similar to the vyokes 47 ofthe. gears-38, 39, etc., and plates 62, similar to 'and serving the samefunction as the plates 43,. are intel;-r` posed between the n'iastertumblers 56 and 57 as well as between the latter tumbler For rotatingthe two sets of tuniblers and setting them to unlocking position toApermit of the retraction ofthe bolt I' employ suitable keys vwhich areadapted while heilig inserted in the -lock to successively act upon theassociated -tumblers and rotate them to registered `or unlockingposition. The keys for this purpose may be of the saine generalconstruction and because of the inter-dependence of the two sets oftumblers the cooperation of both keys is necessary in order to unlockthe lock inthe forni shown. The

lkeys employed may be of any suitable construction adapted tothe"a-ttainnient of the' desired end. One of such keys, that is to saythe key for operating the locking tumblers, may be designated forconvenience the depositors or change-key, while the other key, whichsupervises the locking key may' be termed the master or guard-key. Inthe present embodiment of l,the invention .these keys are generally thesamebut differ 4tend from the end thereof a distance 4at least equal tothe combined thickness of the In the present instance the toothedportion of the key is in the forni of an elongated pinion 63 the teethof which are soproportioned as -to properly coperate `with the teeth ofthe gears'. Each of these keys is provided with a sinuous slot or way,the conformation of which depends upon the relative positions of the tnmblers when in theirlocking position. vAs shown in Fig. .13, the key iscylindrical and extending along the outer portion of the length of thepinion 63 is a longitudinal slot 64 which terminates at its inner end ina sinuous groove 65, For convenience in making the key the fingerpiece-of the key may be formed witha tubular socket 66 the bottom -ofwhich is threaded, as at-67, as shown in Fig, 12, while the key pinion63' is provided with -a cylindrical extension 68 having its end threadedso as to screw into the socket. With this ar- :rangemnt the v,extensionmay be convenu-- pinion portion of the key is `screwed into the socketthe parts may be hrazed or otherwise secured together to preventseparation. Fig. 16 illustrates diagrammatically the depositorsunlocking key 69, while Fig. is a similar view of the master orguard-key 70.. It will be understood., however, that the .character ofvthe slot in each instance de pends altogether upon the relativepositions of the slots or notches of tumblers when such tumblers are intheir locked position, and that any variation in such relative positionsA will necessitate the employment of a key pinion thereof will engagesuch gears. The

pin projects beyond the trontwall of the lock and is provided with aradial lug 74. A second pinf75 is located in a key way 76 adjacent tothe gears 55, 56, 57 and 60 and is provided with a lug 7T, suchconstructionvheing similar to the key way 72' and pin 71 associated withthe gears 38, etc. The faceplate 16 is of course provided with suitablekey holes through which the pins 71 and 7 5 project and through whichthe keys may be passed while sliding and turning on the'pins 71 and 75.`-As 4the key 69y is engaged with the depositors or change keyhole andpushed into the lock the longitudinal portion 64' of the slot permitsthe key -to Aslide* on the pin in a straight line until its pinion comesinto engagement with 'y the lirst gear 38. Then as the key is pushedinto registered position.

in` farther owing to the engagement with the lug 74 on the pin 4with thesinuous slot in the .key t-he latter is turned so as to rotate the'tumblers and finally bring them In unlocking the lock the depositors key69' is inserted on its associated pin 7l and pushed inwardly. Thestraight portion of the slot 64 moves along the lug "Z4 until thesaid'lug enters the short spiral portion 78 of the key slot slightlybefore which time the pinionend of the key comes into'eni gagement withthe gear 38. A slight axial .Y movement of the key will move the spiralportion (8 of the key slot past the lug 74 and during this movement thegear 38 is rotated and consequently the tumbler` 32 bringing the vgating6G' 35 of the latt'er into alinement with the gating of the tumbler Asthe key'is pushed in farther the lug 74 enters the reverse spiralportion 79 of the gating and the gears 38 and 39 being coupled by thekey vpinion the tnmblers 32 and 33 are rotated until their alinedgatings 35 are brought into alinement with the gating ofthe tumbler 34.vThe threegears 38, 39 and 40 are now coupled and the gatings 35 of thetumblers are in alinement.

vment with the gear 42 which gear it will be remembered meshes with thepinion 36. The

master or guard-key being inserted in itsv keyway, by reason of theformation of-its' slot it is rot-ated and successively picks up' theguard or supplemental tuinblers 55, 56 and 57, moving them so that theirgatings 58 will he brought into registered position, and in position toreceive the tooth 59, and nally engages the gear 60. Up to this point it'is immaterial which key is inserted lirst and they may be insertedsimultaneously,

The guard-key 70 'is now rotated to the right or clockwise and throughthe medium of the gear 60 and pinion 53 the cam 50 is moved intoengagement With and moves the latch 23, as showninFig. 2, the tooth 59yof the hub 5l entering the alined gatings 58 of the master tumblers 55,etc., so that the' cam is inserto move. The movement of the latch 23disengages it from the stop 25, the tooth v29 of the same entering thealined gatings of the tumblers 32, 33 and 34. The key 69 is vnow turnedcontraclockwise', by reason of the concentric portion 82 of the keyslot, andthrough the medium or' the pinions 36 and 42l and rack bar 22the bolt is retractedj the toot-h 29 ofthe latch heing in the gatings 35the end of the latch clears and passes the stop 25, and as all the parts38, 39, 40, and 42 are geared up on the depositors or change-key androtate together, the parts 32, 33, 34 and 36 meshing therewithrespectively are moved thereby, and the rack 22 meshing with the pinion36 moves the latch 23 in unionism with the gears 32, 33 and 34 so thatits' tooth 29 will roll out of the gatings as the bolt is retracted, andwill move again into engagement with the gatings when the lbolt lismoved ahead or shot. To throw the bolt the movement of the key 69 isreversed and then both keys may be "withdrawn, such action merelyreversing the operation and restoring the parts to their lockingpositions. .The master or guard-key may of course be employed with anyunlocking key,

as' itsbiiicefs merely to release the bolt 181mb; r y

llO

The object of the spring pressed yokes 4f? and 6l is ton'iaintain theassociated gears in proper position when the bolt vis thrown and toprovide additional security against picking the lock as well as torestore the ltumbler would by means of the spring p ressed yokes bereturned to its proper position with relation to the other gears,thereby avoiding disarrangement of the parts.

By reason of the interlocking construction described a lock is providedwhich is absolutely dependent for its'operation upon two keys so thatWhere the keysare in the possession of diferent persons, such as therenter of a safety deposit boxand the guard, both such persons must bepresent to open the lock. Moreover, the lock is made doubly secureagainst picking inasmuch as two sets `of ti'unblers must he manipulated'in order to retractthe bolt, and the particular character of 'thetumblers renders the lock proof against the requisitemanipulation'Without proper keys. In the event that an attempt is madeto pick the lock the parts are automatically. restored to theirpredetermined positions so that there is no. danger of the lock beingput out of order When tampered with.

The means provided for resetting orchanging the combination of the-lockin the event it is desired for anyreason to changev the unlockingordepositors key, and the means for preventing the surreptitious resettingof the lock, may be of any suitable form or character', and theseresults are ac` complished vin the present embodiment of the'inventionin the manner now to be described.

kAs above described the locking tumblers are in'two parts formed by thepinions and gears respetively, and as shown in Fig. 3, that portion ofthe post 30 on Which the pinions 32, 33 and34 are mounted is eccentrictothe pivoted. ends o f such post, and this post is designed tobe rotatedso astodisengage the pinions 32, 33 and 34 from the gears 38, 39 and 40to provide-for resetting the combination. For this purpose the end vofthe post.

passing through the rear wall of the lock casing `may. be provided Witha threaded' socket 82 into which screws a key, such asa bolt 83. Byturning this boit it Will beobvious that owing to the eccentric portionof the post the pinions 32, 33 and 34 Will be disengaged from theirassociated gears as.

shown -in Fig. 8. Under normal conditions suchdisengagement 1s'prevented by a stop or dog 84 which is pivoted tov the post 41andengages a notch 85 in a disk 86 fixed to the'post 30. The dog isprovidedwth an |varm 87 having a yoke 88 in which is locateda'controlling cam or eccentric 89 fixed to the hub 51 back of the pinion53. The disk 86 able distance apart to limit the rotary move spaced a.suitable distance therefrom. The

` tumblers 55, 56 and 57 are provided With gatings 93 adapted bysuitable movement of such tumblers to be moved into alinement so as toreceive the tooth 92.

In resetting the lock a depositors keyvfor which the lock has previouslybeen set is inserted in the lock so as to move the locking tumblers intotheir unlocking' position, as shown in Fig. 7. -A managers key 94, Whichis inthe possession of an authorized official, suclras the manager ofthe safety deposit vault, is noW employed for the purpose of releasingthedog 84. The managers key is 'substantiallysimilar to the otherkeysheretofore described With the exception that the concentric innerend 95 of the slot extends in a reverse direction from the correspondingportion ofthe slot of the master or guard-key 70. The sinuous slot G5 ofthe managerskey 94 is of such character effects the movement of thetumblers 55, 56 and 57 to bring their gates 93 into alinement and inposition to receive the hub tooth .92 vso thatl the hub may .be turned.W hen the parts, as shoWn in Fig. 8. The 'unlocking key is now Withdrawnfrom the lock, their gatings 35 engaging the tooth 29. The new andduring such insertion it rotates the gears tion of its slot.v The keyhaving -been en- '38, etc., are in unlocking position for the new keyand that the pinions 32, etc., are also inunlocking position, that is tosay, 1n

such position that their gates are in aline'-Y is provided Withshoulders 90- spaced a 'suit i a second tooth 92 similar to the tooth 59and i that when the key is inserted in the lock it depositors orchange-key is then inserted tirely inserted it is apparent that thegears ment of the post 30. As shown in Fig. 4,

managers key is inserted .in the lock its. 'l

tated disengaging the registered pinionparts of the locking tumblersfrom the gear 38, 39 and 40 in accordance with the formaiso y mentallock were not in existence.

ment and in the path ofthe tooth onthe bolt latch. The post 30 is nowrotated.back

ward so as to throw the pinions into engagement with the gears, and thenboth the new key and the managers key may be with-` tric 30.

The tumblers 55, 56, 57 with their associated parts provide a tumblerlock which forms' a supplemental lock for locking theadjusting-eccentric 30 against being turned in either direction forresetting the lock to a new `key as" might readily be donesurreptitiously leven in the brief interval during which the bac-k ofthe lock is exposed in use bythe door of the safe-deposit box to whichit is applied standing open while the inner box is withdrawn. It will beunderstood, of course, that this supplemental lock isnever usedexceptwhen it vis desired to reset the main lock to a new key. At allother times the main lock is used precisely as if the supple- For thelegitimate resetting-of the mainlock to conform to another key, themanagers" key is indispensable for it must be used tounlock thesupplemental lock and effect the turningof the controlling eccentric 89through the mediumofthe pinicns 60 and 53,-. and itl must also be us'edto return the controlling eccentric 89 after the tumbler-s are reset tolock vthem in reset position on la. diierent or changeable key lock.

combination.

While the `present embodiment shows the supplemental or safety lockcordinatedfwith a lock requiring the supervision of the guard-key, it isobvious that lwhen the box to which itis applied is open.

The key to the supplemental lock is kept by the manager `of thesafeedepositvault' and it is never' brought into use except when he iscalled upon to produce it by the depositor. On the one hand, none of thebaule oiiicials can get at the safety lock to use the managerskey in theabsence of the depositor as the vtumblers .of the main lock must firstbe alined jby-the use of the deg.

positors key which the depositor. .holds and even ,if the box beleftopen with the users key-withdrawn as is usual, the guard can notVreset the combination as the users key must be inserted and turned tomove the locking tumblers to position to aline their gatings to unlockthe bolt before the resetting device can be operated, the toothl29otherwise preventing the eccentric movement of the part 30 and itsassociated gears by abutting on the peripheries of the latter, s andfurthermore even if the boX be left open with the users key in place theguard can' not resetthe combination as the managers key is indispensablefor this purpose; on

the other hand, in the preferred embodiment of the invention with alock-requiring the cooperation' of a master or guardvkey to open it, thedepositor himself or one finding the depositors key could'not get attheresetting means until the box containing the lock had been opened bythe cooperation of the guard holding the guard-key, as these',

two keys arenecessary to unlock the box;`

and in no case can the guard or other unauthorized person operate theresetting means to reset the combination as the safety lock under thesole control of the manager locks the resetting means against allunauthorized or surreptitious resetting of the combination.

Having describedv my invention what I claim as new and desire to secureby Letters Patent of the United States, is.

1. In a multiple-keyl lock, the combination with a two-part tumbler therespective parts whereof are constructed to be reset for coaction withdifferent keys, of means forl resetting the said tumbler, anda'supplemental lock for locking the said resetting means againstsurreptitious resetting of the tumblers, said -supplemental lock -beinglocked and unlocked by a key.

2. In a multiple-key lock, thecombination with a plurality of two-parttumblers'the an adjusting-eccentric for lresetting the tum.-

blers, and. a supplemental lock for locking the eccentric.

iis'

' 3. In af.inultipl e-key lock, the combination with a plurality oftwo-part tumblers the respective parts of which are constructed to bereset for coaction with different-keys, of means for resetting the saidtumblers, anda supplemental V'tumbler lock for locking the saidresetting means against surreptitios lock being locked and.l unlocked bya key'. 4. In a. multiple-key lock, the combinationl 'resetting of thetumblers, said supplemental y rast"` with, a plurality of 'two-parttumblers the zrespective parts of which are constructed to be reset forcoaction with different keys,'of

an adjustingeccentric for yresetting the said ,tumblera a supplementaltumbler lock, and

parts of which are'separable for pinions-interposed between theeccentric andv supplemental lock for locking the said eccentric.

5.- In a multiple-key lock, the-combination With a two-partvpivoted-tumbler the respective parts of which are constructed to bereset for coacti'on with different keys, of means for resetting the saidtumbler, and asupplemental lock for locking the said resetting meansagainst surreptitious resetting of the tumblers, said supplemental vlockbeing locked and unlocked by a key.

6. In a multiple-key 1ock,-the 'combination with -a two-partpivoted-tumbler comprising a main part anda supplemental partconstructed to beset in a variety of relations with respect to eachother for 'coaction' With different keys, of. means for resettingthesaid tumblers, and a supplemental lock for locking the said resettingmeans against surreptitious resetting of the tumblers, said supplementallock being locked l.and-unlocked by the key.

T. Ina multiple-key lock, the combination with a plurality of'tWo-partpivoted-tumblers each comprising a main `part and a supplemental part,and each constructed to -have1its supplemental part adjusted Wit-l1respect to its main part an adjusting-eccentric reacting with all of thetumblers for resetting them for coaction with different keys, and asupplemental lock for locking the eccentric.

e. In-a multiple-key lock, the combination with a plurality of two-partpivoted-t-umblers the parts of which are separable for being set forcoaction with different keys, of means coacting with all of the two-parttumblers for simultaneously moving one part of each tumbler with respectto the other part thereof, so as to vunlock the two parts of eachtumbler, and then restoring the parts of each tumbler t0 their lockedpo: sitionsafterone part of each tumbler has been set to avkey, and asupplemental lock for locking the resetting means against surreptitiousresetting of the tumblers, said supplemental lock being locked andunlocked by a key.

9. In a multiple-key lock, the combination wit-lila plurality oftwo-part tumblers the l i being set t'or coaction with different keys,of an adjusting-.eccentric passing through all of the tumblers forsimultaneously separating their parts to permit them to be reset andsimulltaneously restoring their parts to their normal positions, and asupplemental tumblerlock locatedinl the case of the multiple-key lockandl connected with the said eccentric bymeansof pinions whereby theeccentric isy held inthe posit-ion which it has' when the respective.parts of the tumblers are com- 10.v In a mult-'iple--key'19t-"kfA thecombinaviding avchangeable key lock wherein the combmation is changedonly after the insertion and turning of a change-key to posltion.

to move the tumblers to unlock the bolt, a

safety locking device for preventing the surreptitious resetting of thetumblers to a dit'- ferent key, and a key for actuating the safetylocking device.

12. In a lock, a bolt and tumblers providi ing a changeable key lockwherein the tumbler combination is changed only afterthe insertion andturning olb a change-key to position to move the tumblers to unlock thebolt, means to reset the lock, .and a. safety locking devicepreventingthe `operation `of the resetting means until the locking device isoperated by its proper key.

13. In a lock, a bolt and tumblers providing a changeable key lockwherein the tumbler combination is' changedonly "after the insertion andturning of a change key to position to nio-vc the tumblers to unlock thebolt. means operated from the rear face of the lock to reset thecombination, and' a safety locking. device preventing the loperation ofthe resetting means until the locking device is operated by its properkey. y

Y llt. In a multiple-key lock, t-hecombination with a bolt and aplurality of tumblers constructed to be reset for coaction withdifferent keys, of an adjusting-eccentric operative `from thel rear ofthe lock for resetting the said tumblers, a supplemental tumblerlock,and pinions interposed between the eccentric and supplemental lock forlocking the said eccentric.

In amultiple-key lock, the combination with a bolt and locking-tumblersconstructed to bereset for coaction Wit-h dii'erent keys, of meansoperative lfrom the rear face of the lock for' resetting vthe* saidtumllt) blers only when the tumblers areA in position to unlock thebolt, and a supplemental lock i for locking the said means againstsurreptitions resetting untilsaid vsupplemental lock is operated by itsproper key.

16. In a multiple-key lock, the combination with `a bolt and a pluralityof locking tumblers constructed to be reset for coaction with differentkeys, of anadjustlng-eccentric for'. resetting.l the vtumblersandoperative only i vWhen-the locking tumblers are in predeterminedpositiom'and-a supplemental lock .for loeltii'igthe eccentric.

17. In a lock, abolt'and lockingr tumblers "bij providing a changeablekey lock in which lthe tumbler combination 1s changed after..

when the tumblers are in a predeterminedA position, and a supplementallock for locking the resetting means against surreptitious change of thecombination.

19. In a changeable key lock, a bolt, locking tumblers, means to resetthelock only when the tumblers are in a predetermined position, and asupplemental lock for locking the tumblers against surreptitionsresetting. 4

20. In a multiple-key lock, the combination with a bolt andlockingtumblers constructed to be set in a variety of relations for coactionWith different. keys, of means for resetting the said tumblers onlyivhenthe latter are in position to unlock the bolt, andasupplemental lock forlocking the said means against surreptitious resetting. and operativeindependent of the position. of the bolt or tumblers.

21. In a multiple-key lock, the combina` tion with a bolt and aplurality of tumblers constructed to be reset kfor coaction withdifferent keys, of means' for resetting the said tumblers only when thelatter are in position to unlock the bolt, and a supplementaltumbler-lock for ylocking the said means against surreptitious resettingand operative lindependent. of the position. of the bolt or lockingtumblers. i

22. In a changeable'key ljock, the combinationwith a bolt, andtumblers'Which can be reset only when in position to unlock the bolt, of a safetylocking device which must-.be operated by a key beforethe main 4tumblers'of the lock can be reset to conform to a different key.

23. In a changeable'key lock, the combination With a bolt and tumblers,of a single key Safety locking device which must be operated by its keybefore the main tumblers ot' the lock can be reset'to conform to adii'erent form ofchange-key, and is operated by the key after thetumblers are'reset.

24.4 In a changeable key lock, the combination With a bolt and a seriesof locking turn-v i' blers therefor, of. a main opening for the keyactuating the bolt, and a single key safety locking device for saidlocking tumblers Which has an independent key-.opening and`l must beoperated by its key before the main tumblers of the lock can be reset,and i-s operated bythe key after the tumblers are reset.

25. In a changeable key lock, the combination with a bolt, a series Aoflocking tumblersftherefor, and a key for actuating the tumblers andmoving the bolt, of a safety locking device for preventing surreptitiousresetting of the tumblers, and a key for actuating the safety lockingdevice, the parts being arranged 'whereby the combination re# mainslocked until the locking tumblers are moved to position to unlock thebolt and the safety lock is operated by its key.

26. In a changeable key lockthe combina tion with a bolt, tumblerstherefor, and a key for setting the tumblers and moving the bolt, of asafety locking device for prevent' ing surreptitious resetting of thetumblers', and a key for actuating the safety locking device, the partsbeing arranged whereby the. lock is secured against resetting for adifferent key until the tumblers are moved to position to unlock thebolt and the safety lock is operated by its'key.

27. In a multiple key lock, the combina tion With a bolt and a pluralityof lockingtumblers capable of coperation in differentk combinations, aneccentric controlling the resetting of the tumblers, and a supplementallock permitting lthe operation of the eccentric When unlocked and forlocking the eccentric against surreptitious resetting when locked.`

28. In amultiple-key lock, the combina4 tion with a bolt and a pluralityof locking tumblers which are adapted to be set for coactionY Withdifferent keys, of an eccentric controlling `the resetting of thetumblers, "and a supplemental lock permitting-the op. eration of theeccentric when unlocked 'and for locking the eccentric againstsurrepttious resetting When locked, the arrangement of parts being suchthat the tumblers are locked against resetting for a different `keyuntil they are moved to position to unlock the bolt and the supplementallock isoperated.

29. In a changeable key lock the combination with a lock-casing, a bolttherein, guards keys and depositors keys for operati ing said bolt fromthe front face of the lock,

of a resetting device for changing the com ingtumblers andy supplementaltumblers' both of which must be' key operated before lSO ' tumblers,another to set the guards tumblers,

and the other to move the movable element Y to permit the lockingtumblers to be reset.

33. In a changeable key lock the combination with a bolt, guard tumblersand locking tumblers'both of which are set to retract the bolt, and astop to prevent surreptitious resetting of the locking tumblers, of akey for actuating the guard-tumblers, a key for actuating thelocking-tumblers, and a key for actuating the stop to permit the lockingtumblers to be reset.

34. In a changeable key lock the combination withv a bolt, guardtumblers and locking tumblers both of which are set to retract the bolt,an adjusting eccentric for resetting the locking tumblers, means to holdthe eccentric in position, of a key for' actuating the guard-tumblers, akey for actuating Vthe locking-tumblers and for withdrawing the bolt,and a key for actuating the eccentricholding means.

35. In a changeable key lock the combination with a bolt, guard tumblersand locking tumblers both of which are set to retract the bolt,- andmeans for controlling the resetting of the locking tumblers, of aplurality of key-openings in the lock-case, and three keys one adaptedto set the lockino tumblers, another to set the guard tumblers, and theother 'to control the resetting means.

36. In a changeable key lock the combination with a bolt, guard tumblersand locking tumblers both of which are set to retract the bolt, andmeans for controlling the resetting of the locking tumblers, of a keyfor actuating the guard tumblers, a key for actua-ting thelocking-tumblers, and a key for actuating the means for controlling theresetting of thelocking tumblers.

37. In a changeable key lock the combination with a bolt, guard tumblersand locking tumblers both of which are 4set to retraet'the bolt, andmeans for4 controlling the resetting of the locking tumblers, of a kefor actuating the guard tumblers, a key or actuating thelocking-tumblers and for withdrawing the bolt, and a key for actuatingthe means tor controlling the resetting of tIie combina-- tion after thelocking tumblers have been set.

38. In a multiple key lock, the combination Witha bolt and a pluralityof lockingtumblers comprising two sets of wheels ca- 'pable ofcooperation in diieren't relatlve po- .Sitions, an adjustingeccentriccoactingwith all of the -wheels of one set for resetting them forcoactionwith the wheels of the other set, and a supplemental lock `forlocking the eccentrics *against surreptitious resetting action. l

39.' In a multiple-key lock, the combination with a bolt and a)lu'rality of tumblers comprising two sets ot' coperating wheels whichare se arable for being set for coaction with -ditterent keys, of anadjusting eccentric coaeting with all of the wheels of one set forsimultaneouslyV moving said set with respect to the other set so as tounlock the sets, andthen restoring the parts to their locked positionsafter one set of wheels has been set to a key, and a supplementallockfor locking the eccentric against surreptitions resetting action.

40. Inla multiple-key lock, the combination lwith a bolt and'a pluralityof sets of Wheels forming tumblers the sets of which are separable forbeing set for coaction with dilferent keys, ofl an adjusting-eccentricassing through all of the'wheels of one set -tor simultaneouslydemeshing the sets to permit them to be reset and for simultaneouslymeshing the sets in their reset relatiomand a supplemental tumbler lock-located in the case of the multiple-key vlock and connected with thesaid eccentric by means ofpinions whereby the eccentric is held lin theposition 4 tumblers are combined as in use.

41. In a lock, the combination with a bolt and a clogging latchtherefor, of a plurality of rotatable tumblers having gates normally outof alinement and adapted to be moved which it has when the respectiveparts of the into a predetermined position to permit of f the release ofthe latch, keyoperated gears for moving the tumblers into such predeter-42. In a lock, the combination withA a bolt and a latch-therefor, aplurality of tumblers having gates normally out of alinement, gears forrotating the tumblers to bring the gates thereof into alinement topermit of the'relea'se of the latch, a key-for 'engaging the teeth ofthe gears to rotate the latter,

means for disengagingA the tumblers from the gears simultaneously,whereby such tumblers may be disengaged when in` their unlockingposition to permit of the resetting of the lockby another key, and asupplemental lock for locking fthe 'disengaging means to preventsurreptitious resetting of the main lock. Y

43.' In a lock, the combination with a bolt t and a latch for preventingretraetionof the bolt, of tumblers having gates normally out- CII ofalinement, gears engaging the tumblers, a key having a sinuous slot andprovided with a pinion, a key guide having a lug adapted to coperatewith the slot and whereby when the key is inserted the gears aresuccessively engaged and rotated to bring another key the tumbler gatesinto alinement to permit of the release of the latch, provision fordisengaging the tumblers from the gears when I ock.

44. In a lock, the combination with alock casing, a bolt and a latch forpreventing retraction of the bolt,`a. post pivoted on theA casing andhaving` an eccentric portion, a

plurality of tumblers pivoted on such eccentric portion and having gatesnormally out 'of alinement, gearsy meshing with the pinions, a key-forturning the gears to rotate the tumblers to bring their gates intoalinement, means for releasing the latch when the gates of the tumblersare in alinement, a dog for holding the post against movement, a cam forreleasing the dog, andprovision for turning the post to disengage thetumblers from the gears when the (10g is released, whereby such tumblersmay be disengaged when their slots are in alinement and the gears may beoperated by another keyto unlocking position to reset the lock and the.tumblers then moved into engagement therewith, and a supplemental lockcontrolling the cam to prevent surreptitious vresetting of the lock.

45. ln a lock, the combination with a casing, a bolt, and a latchtherefor, of an eccentric-post pivoted o'n the casing, toothed tumblerspivoted on` the post and having slots normally out of a-line'ment, gearsmeshing with the tumblers, a key for successively engaging the gears torotate the tumblers and bring their slots into alinement to permit ofthe release ofthe latch, a hub having a cam to release the latch and apair of teeth, a pinionvv and a second camiixed tothe hub, a dog forholding the post against movement andprovided with a yoke cooperatingwith the second cam, tumblers having two sets o'f notches, keys foractuating -the said tumblers one of which keysis adapted to` bring oneset of notches into alinement to receive one ofthe hub teeth andtoactuate the hub pinion to move the latchactuating cam and the other ofwhich is adapted to bring'the other set of notches in alinemcnt torecel-ve the other hub tooth and to turn the hub pinion in the oppositedirection and move the second cam to disengage `and locking meanstherefor,

the dog from the post, and provision for turningl the post to disengagethe tumblersv from their gears when the dogv 1s released,

whereby such tumblers may be disengaged when their slots are inalinement andthe gears may be operated by another key to unlockingposition to reset the lock and the tumblers then moved into engagementtherewith.

4.6. Ina multiple-key lock, the combination with a bolt, and a two-parttumbler the v tumblers only when the tumblers are in posi- .tion tounlock the bolt, and a supplemental tumbler-lock for locking the saidresetting means against surreptitious resetting ot' the tumblers. v

48. 1n a multiple-key lock, the combinationv with a bolt, and a two-partpivotedtumbler the respective parts of which are constructed to be resetfor coaction with different keys, of means for resetting the saidtumbler only when the tumbler ,is in position to unlock the bolt, and asupplemental lock for lockingthe said resetting means against`surreptitious resetting of the tumblers.

49. In a multiple-key lock, the combination with a two-part tumbler therespective partswhereof .are constructed to be reset for coaction withdifferent keys, Of'means for resetting the said tumbler, and asupplemental lock locked by a key to lock the tumblers in resetposition.

50. In a multiple-key lock, the combination with a plurality of two-partlocking tumblers the respective parts of which are constructed to bereset for coaction with the 5 different keys', of means for resettingthe said tumblers` and asupplemental tumblerlock locked by a key to lockthe main tumblers on their new combination.

5l. In a lock, the combination with a bolt and locking means therefor,of a tumbler adapted to be moved into position to permit of the releaseof the said locking means, andv independently actuated tumbler mechanismt for releasing the said llocking means when the first tumbler is insuch position.

52. In a lock, the combination with a bolt of a plurality of tumblersadapted to be moved into predetermined position to permit of the releaseofthe said locking means, and independently position.A e A,

. 54,. In -a lock, thecombination with abolt anda latch for preventingthe-retraction of the bolt, of two sets oftuniblers yi)nent- Which`leasing' means;y

56; In `afloclt,thecolnbination witha bolt,

-actu'ttedutumbler mechanism 'for releasing .A

the said locking means when thefirst -tumblers are m such position.,

53. In a lock, the combination With-a bolt and alatch for preventingitheretraction of the bolt, tumbler-s adapted to be moved into predeterminedposition to permit. of the release o -the latch, and. independentlyactu-- ated tumbler mechanism lfor releasing the latch when the -first-tumblers-v are in such sets is adapted to bemoved. in to predeter'mined position to-tpermitof thereleaseot` fwhen the first mowed tos'iich `20` position. t

lock-,.tlieedmbintion with a bolt, a latch for preventing retraction `ofthe bolt, of tumblcrs adapted'l to be ,moved 4into regvisteredpositionto permit of the release ,of the latch, means for releasin thelatch when the said .tumble'rs are in registered position,y

.and other tumble'rs for controlling the rea latch for preventingretraction of the bolt tumblers adapted to'be movedinto registeredposit-ion to permit of therelease of the latch, a cmn for releasing thelatchlwhe'nthe tumblers are inregistered position and other tambin? forpreventing movement 'of the cam.- H

'57.*111 alock, ,the'cmbination with a bolt, .an'fllocking meanstherefor, of a plurality 'ofmotatable tumbl'er's adaptable to be movedmeans when the first i, '58.YIn a `into predetermined position `topermit of the release of said locking means, and. tumbler mechanism lforreleasing the said locking tumblers are in such pbsition.

lock, the combination with aibolt andlocking means therefor, of aplurality of successively actuated rotatable tumblers adapted to bemoved into predetermined position to permitlof the `release of the saidlocking means, and tumbler mechanism for releasin ,the said lockingmeans when the first tum Iers are in such position. v

59. In Va lock,`the combinationwith a bolt Aand a latch' pivotedthereon, for. reventing the retraction .of the bolt, rotatab e tumblersadapted to be moved into predetermined position tope'rmitoie the releaseof the latch, means 'for releasing the latch when the tuinblers are`insuch position, and a second set of rotatable tumblers actuatedindependently of the first mentioned set for controlling the releasingmeans.

60. yIn a lock, the combination'with a bolt, ya latch for preventingretraction of theibolt, tumblers adapted to be moved into regis- .blersare in such tered position to permit of the release of the latch, -a camfor releasing the latch when the tumblers are in registered position,master tumblers'for preventing movement ofthe cam, and means foroperating the cam when the master tumblers are in predetermined'position.

and a latch pivoted thereon and engaging a fixed portion of the lockcasing to prevent retraction of the bolt, lrotatable tu'mblers adaptedto be moved into predetermined position' to prevent the release of thelatch, a .cam for' releasing' the latch when the tumposition, andindepend- -entlyoperated rotatable tumblers contro1- 625 In a lock, the

ling the' cam.

combination with a bolt,

61. In a lock, the combination with a bolt,

a latch `for preventing retraction ofthe bolt,

. rotatable tumblers adapted to be movedginto registeredpositiontopermit of the 'release -of the latch, a cam for releasing the latchwhen the tnmblers are in registered position,- mastcr tumbler-Saforpreventmgmovement of the cam, and means -for operating the cam whenthemaster tumblersl-arev vpredeter.

mined position. 1

63. In a lock, the :combination-"with, a ibo-lt and a latch for same",of rotata le .tumblers provided with gatings adapted when f lacedintregistery by movement'of the tumb ers to permit o'f the release ofthe latch, a' cam` for releasing the latch 'when thjegatings arev inregister,and

and 1a latch for p r'rotatable tumblers `forpreventing movement o fthefcam.

64. In a' lock, the combinationjwith a bolt and a latch forpreventingretraction of the sarnmrotatable .tumblers provided-@with gat' of, oftumblers vhaving gatings adapted to be placed in register when. 'thetumbler-s are moved to' permit of the release .of the latch, ,a cam forreleasing the latchmaster tumf blers for preventing the movementof thecannexcept when such ltumblers are` in predetermined position, means formoving the master tumblers, and means for retracting the bolt when thelatch is released.

preventing retraction "oil-the 1. l

holding'thecam 66. In a lock, the combination with'a bolt and a latchfor preventing retraction` there-l of, of tumblers 'having gatings adated to be placed in register when the tumb ers-are in predeterminedposition to'permit of the release of theLlatch, a cam for releasing thelatch 'when the tumblers arein Such`prede termined position, andtumblersfor preventing the movement of the cam and-having gatings adapted to:vbe. placed in register when the latter are in a predetermined positionto permit of the movement of the cam.

67. In a'lock, the combination with a bolt .and a latch pivoted theretofor preventing retraction of the bolt, of' a plurality of lockingtumblers having gatings normally lout ot-alinement, a cam for releasingthe latch when the tumbler gatings are in alinenient,

master tumblers having gatings normally out of register to preventmovement of thc cam, meansr for moving the locking tumblers to bring thegatings thereof in alinernent, means for moving the master tumblers toplacethe gatings thereof'in alinement, and

and a latch for preventing retraction of the means for retracting thebolt When the latch is released. 4 68. In a lock, the combination wlth abolt same, of a plurality of rotatable tumblers having atings normallyout of alinement,

means or rotating the tumblers to bring their gatings in alinement topermit of-the release of the latch, a cam for releasing'the latch, aplurality of rotatable tumblers hav- .ing gatings normally out ofalinement,

means for rotatin the tumblers to bring their gatings into a inement,means for moving the camyvhen the gatingsof thelatter tumblers are -inalinement, and means for retracting the bolt When the latchvis released.

69. In a lock, the combination with a bolt and a latch for preventingretraction-ot` the same, of a plurality of rotatable tumblers havinggatings normally out of alinement, means for releasing the latch whenthe gatinvs ofl thetumblers are in alinement, a plura ity of rotating,tumblers for preventing movement of the said means, and 'keys 'adaptedto successively. actuate both sets of `normally out of `alinemlent, akey provided With a pinion adapted to successively actuate the gears tobring their gatings into alinement, and means actuated by the key tomove the cam when the saidv notches are in alinement. f

7l-. In a lock, the combination with a bolt yand a spring latch forpreventing retraction of the same` of a post, al plurality of toothedtumblers pivoted oni vthe 'post and having gatings normally out ofalinement, a plurality of gears meshing with the tumblers, a

'Mason' pin having a lug, a key adapted to the pin vand having a sinuousslot cooperating With the lug and rovided With a pinion adapted tosuccessive yr engage the gears and rotate the tumblers to brmgtheir'gatings into alinement to permit of. the release of the latch, ahub having a cam for releasing the latch, such hub also being providedWith a tooth and having a pinion fixed thereto, a plurality of geartumblers having gatings normally out of alinement, a gear meshing withthe hub pinion, and a key having a pinion adapted to successively engagethe gear tumblers to rotate the same and bring their gatings intoalinement to receive the .hub tooth and then to engage the'gear meshingwith the hub pinion to rotate the latter to move the cam into engagementwith the latch.

7 2. lIn av lock, the combination with a bolt, and locking meanstherefor, of a plurality of tumblers adapted to be moved into predevtermined position to permit of the release of the locking means, meansfor successively actuating the tumblers to move them into suchpredetermined position to permit of the release f the locking means, andtumbler-controlled means for releasing the locking means when thetumblers are in such predetermined position.

73. In a lock, the combination With a bolt and a locking -latchtherefor, of a plurality of tumblers adapted to be moved intopredetermined position to permit of the release of the latch,tumbler-controlled means forreleasing the locking latch, and a key forfirst moving the tumblers into such predetermined position and thenafter the release of the locking latch to retract the bolt.

' 74. In a lock, the combination With a bolt, of a plurality cirotatable tumblers each having a gate. a key for successively actuatingthe tumblers to moveA their gatesv into register, a boltI` a latchpivoted on the bolt and having atooth to enter the tumbler gates When inregister and the latch isv moved, and means for moving the. latch.

` 75. 'In a lock, the combination with a bolt, n

of a plurality of rotatable tumblers each having a gate, a key forsuccessively movmg the tumblersto register their gates,- a

bolt, a latch pivoted on the bolt and having a tooth to enter thetumbler gates When the,

latter are in register and the latch is moved,

and a cam moving the latch.

76. In a lock, the combination with a bolt,

of a plurality ofv rotatable tumblers each having a gate. a key forsuccessively actuating. the tumblers to move their gates into reglster.a bolt latch havinga tooth to enter .the tumbler gates when in register`and the latch is moved, a cam for moving the latch, and a plurality oftumblers adapted to be moved 1nto predetermined position to permit ofthemovement of the cam.

77. In a lock, the combination with a bolt, of a plurality of rotatabletumblers each having a gate, a key for successively engaging thetumblers to move their gates into register, a bolt latch having a toothto en ter the -tumbler gates when in register and the latch is moved, acamtor moving thelatch, a plurality of tumblers'adapted to be moved intopredetermined position to permit movement of the cam, and means formoving the cam. y

78. lIn a lock, the combinationwith a bolt, of a plurality of rotatabletumblers. each having a gate, a key for successively actuating thetumblers to move their gates into register, a belt latch having a toothadapted to enter the tumbler gates When in reglster and the latch ismoved, a cam for moving the latch, and aplurality of rotatable tumblershaving gates normally out of register, and a key adapted to first movethe llatter tumblers to register their gates to permit of the movementof the cam and then actuate the cam.

7 In a lock, the combination with a bolt, a latch means for releasingthe latch, of two sets of rotatable tumblers, the tumblers of each sethaving gates normally out of'alinement, a key-:tor successivelyactuating the tumblers of one set to bring the gates thereof intoalinement to permit of the release y of the latch, and a key`forsuccessively actuating the tumblers of the other set to permit of theactuation of the releasing means.

v 80. In a lock, the combination with abolt, a latch, a cam forreleasing the latch, of two sets of rotatable tumblers, the tumblers ofeach set vhaving gates normally out of alinement, a key for firstactuating the tumblers of one set to bring the gates thereof intoalinement to permit of the release of the latch and then engaging thebolt to retract the same, and a key for successively actuating'thetumblers of the other set to permit of the actuation of the cam.

81. In a lock, a bolt, rotatable tumblers having normally disalinedgates adapted to register to permit of the retraction ot' the bolt, andspring-pressed yokes for maintainling the tumblers in their normalpositions.

S2. In a lock, a bolt, rotatable toothed tumblers havingnormallydisalined gates adapted to register to permit of the retraction of thebolt, a pair of yokes, and a spring acting in opposition against theyokes to maintain the tumblers with their teeth alined.

83. In a lock, a bolt, rotatable toothed tumblers having normallydisalined gates adapted to register to permit of the retraction of thebolt, pivoted gears for turning thetumblers and having peripheralrecesses, a pair of yokes pivotcd on the pivot of the gears and locatedin the recesses, and a spring having opposite arms reacting against theyokes to normally maintain the gears with the teeth alined.

In testimoily whereof 'I alii); my signature in` presence of tivowitnesses.

BRUCE BQRLAND ll l)

